US3354732A - Regulator for valve of pneumatic tool - Google Patents

Regulator for valve of pneumatic tool Download PDF

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Publication number
US3354732A
US3354732A US499734A US49973465A US3354732A US 3354732 A US3354732 A US 3354732A US 499734 A US499734 A US 499734A US 49973465 A US49973465 A US 49973465A US 3354732 A US3354732 A US 3354732A
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Prior art keywords
regulator
valve
tool
stop member
cam means
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Expired - Lifetime
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US499734A
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John L Wickham
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Black and Decker Corp
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Black and Decker Manufacturing Co
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Priority to US499734A priority Critical patent/US3354732A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating

Definitions

  • the device disclosed herein is a portable, pneumatic tool which includes a motor supporting and enclosing housing, provided with a pendant-type handle.
  • the motor is controlled by a valve located within the housing, and the valve is operated by a trigger carried upon the handle.
  • Means is provided to control the maximum pressure delivered to the motor through the valve and this means is selectively adjustable from without the housing.
  • the present invention relates to a regulator for the valve of a pneumatic tool, and more particularly, to the improved construction of a valve regulator to be used, for example, in a portable pneumatic impact wrench.
  • the regulator comp-rises, in combination, a stationary member having a first cam means.
  • a rotatable axially-movable stop member is provided which has a second cam means cooperating with the first cam means to determine the axial position of the stop member relative to the tool.
  • the stop member has abutment means formed thereon for engaging the valve member, thereby limiting the movement of the latter.
  • the first cam means comprises an annular cam formed with circumferentially-spaced pockets.
  • the stop member comprises a shaft concentrically disposed within the stationary member; and the second cam means comprises a follower carried by the shaft and engaging within a respective one of the pockets in the annular cam.
  • a manually-shiftable member extends beyond the tool and has means cooperating with the stop member for conjoint rotation of both members. This means provides for an axial movement of the stop member relative to the manually shiftable member to determine the maximum degree of movement of the valve member.
  • the stop member has a headed portion disposed concentrically of the manually-shiftable member; and spring means is disposed between the manually-shiftable member and the underside of the headed portion of the stop member, thereby maintaining the position of the regulator.
  • FIGURE 1 is a side elevation of a typical pneumatic tool incorporating the teachings of the present invention, with parts broken away and sectioned to show the structure of the valve regulator;
  • FIGURE 2 is an end elevation, taken along the lines 22 of FIGURE 1;
  • FIGURE 3 is an enlarged fragmentary portion of FIGURE 1, showing (in sequence) the manner in which the regulator limits the maximum degree of movement (sometimes referred to as the travel) of the valve operating member;
  • FIGURE 4 shows the left and right perspective views of the stationary member of the regulator, the stationary member having the annular cam formed therein;
  • FIGURE 5 is a development or plan layout of the annular cam, showing the pockets formed therein to receive the follower carried by the rotatable stop member;
  • FIGURE 6 is a modification showing the manuallyshiftable member and the axially-movable stop member formed integrally as a single element.
  • FIGURE 1 there is illustrated a portable pneumatic impact wrench 10 within which the teachings of the present invention may find particular utility. It will be appreciated, however, that the scope of the invention is not confined thereto, but rather is equally applicable to all types of pneumatically-operated devices.
  • the wrench includes a handle 11 having a conduit 12 connected with a source of compressed air, a passageway 13 in communication with the conduit, a valve mechanism (shown only partially) denoted generally as at 14, the valve mechanism including an operating valve stem 15, the valve stem being guided for limited longitudinal movement in accordance with the movement of a pivoted trigger 16 mounted on the handle, and the regulator of the present invention, the latter denoted generally as at 17, and being adapted to limit the maximum degree of movement of the valve stem, thereby regulating the maximum amount of compressed air admitted through the valve mechanism into the tool.
  • a valve mechanism shown only partially denoted generally as at 14
  • the valve mechanism including an operating valve stem 15, the valve stem being guided for limited longitudinal movement in accordance with the movement of a pivoted trigger 16 mounted on the handle, and the regulator of the present invention, the latter denoted generally as at 17, and being adapted to limit the maximum degree of movement of the valve stem, thereby regulating the maximum amount of compressed air admitted through the valve mechanism into the tool.
  • the regulator of the present invention includes a stationary member 18, generally in the form of a collar, having a tab portion 18a for its proper positioning and retention within the tool.
  • the stationary member 18 has a first cam means formed as an annular cam 19.
  • This annular cam see FIGURE 5, has a series of indented pockets 20.
  • a stop member 21 is disposed, preferably concentrically, within the stationary member.
  • This stop member 21 is preferably formed as a rotatable shaft having a limited axial movement relative to the tool.
  • the stop member 21 carries a follower pin 22 which comprises a second cam means.
  • the pin 22 is adapted to be received within one of the pockets 20 on the annular cam 19, and in this manner, determines the relative axial position of the stop member as it is rotated.
  • the stop member abuts against the operating valve stem, see FIGURE 3, to limit the degree of travel of the latter, hence the maximum amount of compressed air admissible into the tool.
  • the stop member (or shaft) 21 has a headed portion 21a engaging a socket 23 formed in a manuallymovable shift member 24.
  • the shift member 24 and the shaft 21 has a conjoint rotation, but the shaft 21 may move axially relative thereto.
  • a coil spring 25 is disposed between the shift member and the underside of the headed portion 21a of the shaft. This maintains the regulator in its adjusted position.
  • the operating valve stem and more particularly a spool 26 carried thereon, abuts against the follower pin 22 to limit the maximum degree of travel (or throw) of the valve.
  • the pin 22 thereby comprises an abutment means on the stop member 21, but other abutment means may be provided, if desired.
  • the forward portion of the shaft, denoted as at 21b, is merely guided within the longitudinal bore 15a of the tubular valve stem.
  • a manually-shiftable member 27 may be formed integrally with the stop member 21, if desired.
  • the knob 24 may carry graduations to indicate the relative position of the regulator.
  • valve mechanism itself forms no part of the present invention, but is described more particularly in the copending Wickham application Ser. No. 499,733, filed Oct. 21, 1965, entitled Valve for Reversible Pneumatic Tool, and assigned to the assignee of the present invention.
  • a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
  • one of said cam means comprising angularly spaced pockets disposed at different axial positions;
  • a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
  • a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
  • said manually-shiftable member having means cooperating with said stop member for conjoint rotation of said members;
  • said stop member has a headed portion disposed concentrically of said manually-shiftable member;
  • spring means is disposed between said manuallyshiftable member and the underside of said headed portion of said stop member, thereby maintaining the position of the regulator.
  • a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
  • (f) means to maintain cooperation between said first and second means and retain said stop member in its manually adjusted position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Description

Noy. 28, 1967 J. 1.. WICKHAM 3,354,732
REGULATOR FOR VALVE OF PNEUMATIC TOOL Fild Oct; 21, 1965 FIG. I
W a WW. V 7
INVENTOR JOHN L. WICKHAM ATTORNEY United States Patent 3,354,732 REGULATOR FGR VALVE 0F PNEUMATIC TOOL John L. Wickham, Baltimore, Md., assignor to The Black and Decker Manufacturing Company, Towson, Md, a corporation of Maryland Filed Oct. 21, 1965, Ser. No. $9,734 (Ilaims. (Cl. 74-99) ABSTRACT OF THE DESCLOSURE The device disclosed herein is a portable, pneumatic tool which includes a motor supporting and enclosing housing, provided with a pendant-type handle. The motor is controlled by a valve located within the housing, and the valve is operated by a trigger carried upon the handle. Means is provided to control the maximum pressure delivered to the motor through the valve and this means is selectively adjustable from without the housing.
The present invention relates to a regulator for the valve of a pneumatic tool, and more particularly, to the improved construction of a valve regulator to be used, for example, in a portable pneumatic impact wrench.
It is an object of the present invention to provide a regulator for limiting the movement of a valve member so as to regulate the maximum amount of compressed air admitted to the tool motor.
It is a further object to provide a regulator which is efiicient in its operation, compact, economical, and easy to assemble within the tool.
In accordance with the broad teachings of the present invention, the regulator comp-rises, in combination, a stationary member having a first cam means. A rotatable axially-movable stop member is provided which has a second cam means cooperating with the first cam means to determine the axial position of the stop member relative to the tool. The stop member has abutment means formed thereon for engaging the valve member, thereby limiting the movement of the latter.
In accordance with the specific teachings of the present invention, the first cam means comprises an annular cam formed with circumferentially-spaced pockets. The stop member comprises a shaft concentrically disposed within the stationary member; and the second cam means comprises a follower carried by the shaft and engaging within a respective one of the pockets in the annular cam.
Preferably, a manually-shiftable member extends beyond the tool and has means cooperating with the stop member for conjoint rotation of both members. This means provides for an axial movement of the stop member relative to the manually shiftable member to determine the maximum degree of movement of the valve member. Preferably, the stop member has a headed portion disposed concentrically of the manually-shiftable member; and spring means is disposed between the manually-shiftable member and the underside of the headed portion of the stop member, thereby maintaining the position of the regulator.
These and other objects of the present invention will become apparent from a reading of the following specification, taken in conjunction with the enclosed drawings, in which:
FIGURE 1 is a side elevation of a typical pneumatic tool incorporating the teachings of the present invention, with parts broken away and sectioned to show the structure of the valve regulator;
FIGURE 2 is an end elevation, taken along the lines 22 of FIGURE 1;
FIGURE 3 is an enlarged fragmentary portion of FIGURE 1, showing (in sequence) the manner in which the regulator limits the maximum degree of movement (sometimes referred to as the travel) of the valve operating member;
FIGURE 4 shows the left and right perspective views of the stationary member of the regulator, the stationary member having the annular cam formed therein;
FIGURE 5 is a development or plan layout of the annular cam, showing the pockets formed therein to receive the follower carried by the rotatable stop member; and
FIGURE 6 is a modification showing the manuallyshiftable member and the axially-movable stop member formed integrally as a single element.
With reference to FIGURE 1, there is illustrated a portable pneumatic impact wrench 10 within which the teachings of the present invention may find particular utility. It will be appreciated, however, that the scope of the invention is not confined thereto, but rather is equally applicable to all types of pneumatically-operated devices. With this in mind, the wrench includes a handle 11 having a conduit 12 connected with a source of compressed air, a passageway 13 in communication with the conduit, a valve mechanism (shown only partially) denoted generally as at 14, the valve mechanism including an operating valve stem 15, the valve stem being guided for limited longitudinal movement in accordance with the movement of a pivoted trigger 16 mounted on the handle, and the regulator of the present invention, the latter denoted generally as at 17, and being adapted to limit the maximum degree of movement of the valve stem, thereby regulating the maximum amount of compressed air admitted through the valve mechanism into the tool.
With reference to the remaining drawings, the regulator of the present invention includes a stationary member 18, generally in the form of a collar, having a tab portion 18a for its proper positioning and retention within the tool. The stationary member 18 has a first cam means formed as an annular cam 19. This annular cam, see FIGURE 5, has a series of indented pockets 20. A stop member 21 is disposed, preferably concentrically, within the stationary member. This stop member 21 is preferably formed as a rotatable shaft having a limited axial movement relative to the tool. The stop member 21 carries a follower pin 22 which comprises a second cam means. The pin 22 is adapted to be received within one of the pockets 20 on the annular cam 19, and in this manner, determines the relative axial position of the stop member as it is rotated. The stop member abuts against the operating valve stem, see FIGURE 3, to limit the degree of travel of the latter, hence the maximum amount of compressed air admissible into the tool.
Preferably, the stop member (or shaft) 21 has a headed portion 21a engaging a socket 23 formed in a manuallymovable shift member 24. With this arrangement, the shift member 24 and the shaft 21 has a conjoint rotation, but the shaft 21 may move axially relative thereto. Preferably, a coil spring 25 is disposed between the shift member and the underside of the headed portion 21a of the shaft. This maintains the regulator in its adjusted position.
As shown in FIGURE 4, the operating valve stem, and more particularly a spool 26 carried thereon, abuts against the follower pin 22 to limit the maximum degree of travel (or throw) of the valve. The pin 22 thereby comprises an abutment means on the stop member 21, but other abutment means may be provided, if desired. The forward portion of the shaft, denoted as at 21b, is merely guided within the longitudinal bore 15a of the tubular valve stem.
As shown in FIGURE 6, a manually-shiftable member 27 may be formed integrally with the stop member 21, if desired.
By using a cooperating cam means (19 and 22) to determine the relative axial position of the valve regulator member 21, it is possible to obtain non-uniform axial advances of the regulator with uniform rotational advances of its knob (or shift member) 24; and this is an added feature of the present invention. As shown in FIGURE 2, the knob 24 may carry graduations to indicate the relative position of the regulator.
The valve mechanism itself forms no part of the present invention, but is described more particularly in the copending Wickham application Ser. No. 499,733, filed Oct. 21, 1965, entitled Valve for Reversible Pneumatic Tool, and assigned to the assignee of the present invention.
Obviously, many modifications may be made without departing from the basic spirit of the present invention; and accordingly, within the scope of the appended claims, the invention may be practiced other than has been specifically described herein.
I claim:
1. In 'a pneumatic tool, a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
(a) a stationary member having a first cam means;
(b) a rotatable axially-movable stop member having second cam means;
(c) one of said cam means comprising angularly spaced pockets disposed at different axial positions;
(d) the other of said cam means comprising a member receivable selectively in said pockets;
(e) whereby to determine the axial position of said stop member relative to said tool; and
(f) abutment means on said stop member for engaging the valve member, thereby limiting the maximum movement of the latter.
2. In a pneumatic tool, a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
(a) a stationary member having an annular cam formed with circumferentially-spaced pockets;
(b) a rotatable, axially-movable shaft concentrically disposed within said stationary member and having a follower carried thereby and engaging within a respective one of said pockets to determine the axial position of said shaft relative to the tool; and (c) abutment means on said shaft for engaging the valve member, thereby limiting the maximum movement of the latter.
3. In apneumatic tool, a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
(a) a stationary member having a first cam means;
(b) a rotatable axially-movable stop member having second cam means cooperating with said first cam means to determine the axial position of said stop member relative to the tool;
(c) abutment means on said stop member for engaging the valve member, thereby limiting the maximum movement of the latter;
(d) a manually-shiftable member extending beyond the tool;
(c) said manually-shiftable member having means cooperating with said stop member for conjoint rotation of said members;
(f) said means providing for an axial movement of said stop member relative to said manually shiftable member.
4. The combination of claim 3, wherein:
(a) said stop member has a headed portion disposed concentrically of said manually-shiftable member; and wherein:
(b) spring means is disposed between said manuallyshiftable member and the underside of said headed portion of said stop member, thereby maintaining the position of the regulator.
5. In a pneumatic tool, a regulator to limit the maximum movement of a valve member, thereby to regulate the maximum amount of compressed air admitted to the tool motor, said regulator comprising, in combination:
(a) an axially-movable manually-rotatable stop memher having abutment means for engaging the valve member, thereby limiting the maximum movement of the-latter;
(b) a stationary cam adjacent said stop-member;
(0) one of said stop-member and cam having an irregular surface defining a plurality of angularly spaced, first means disposed at different axial positions thereon;
(d) the other of said stop-member and cam having second means cooperable selectively with said first means;
(e) whereby to determine the relative axial position of said stop-member in accordance with its manually-rotated position; and
(f) means to maintain cooperation between said first and second means and retain said stop member in its manually adjusted position.
No references cited.
FRED C. MATTERN, In, Primary Examiner.
W. S. RATLIFF, Assistant Examiner.

Claims (1)

1. IN A PNUEMATIC TOOL, A REGULATOR TO LIMIT THE MAXIMUM MOVEMENT OF A VALVE MEMBER, THEREBY TO REGULATE THE MAXIMUM AMOUNT OF COMPRESSED AIR ADMITTED TO THE TOOL MOTOR, SAID REGULATOR COMPRISING, IN COMBINATION: (A) A STATIONARY MEMBER HAVING A FIRST CAM MEANS; (B) A ROTATABLE AXIALLY-MOVABLE STOP MEMBER HAVING SECOND CAM MEANS; (C) ONE OF SAID CAM MEANS COMPRISING ANGULARLY SPACED POCKETS DISPOSED AT DIFFERENT AXIAL POSITION; (D) THE OTHER OF SAID CAM MEANS COMPRISING A MEMBER RECEIVABLE SELECTIVELY IN SAID POCKETS; (E) WHEREBY TO DETERMINE THE AXIAL POSITION OF SAID STOP MEMBER RELATIVE TO SAID TOOL; AND (F) ABUTMENT MEANS ON SAID STOP MEMBER FOR ENGAGING THE VALVE MEMBER, THEREBY LIMITING THE MAXIMUM MOVEMENT OF THE LATTER.
US499734A 1965-10-21 1965-10-21 Regulator for valve of pneumatic tool Expired - Lifetime US3354732A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951217A (en) * 1974-09-03 1976-04-20 Chicago Pneumatic Tool Company Impact air wrench having a two position pressure regulator
US4016940A (en) * 1975-10-21 1977-04-12 Chicago Pneumatic Tool Company Pneumatic nut runner having a directional valve and an air regulator
US4633978A (en) * 1985-07-22 1987-01-06 Hoffco, Inc. Brake caliper includes mechanical actuator with camming device and manual wear compensator
US5388612A (en) * 1991-12-04 1995-02-14 American Hydro-Surgical Instruments, Inc. Valve assembly
EP0682200A1 (en) * 1994-05-14 1995-11-15 Elektro- und Gas-Armaturen-Fabrik GmbH Actuating mechanism in a gas valve for gas appliances
US20050103306A1 (en) * 2003-11-17 2005-05-19 Nobuyuki Izumisawa Valve apparatus for air tool
US20060185657A1 (en) * 2005-02-24 2006-08-24 Stanley Gabrel Paintball gun with power assisted trigger
US20100263737A1 (en) * 2009-04-16 2010-10-21 Chia-Chiung Chuang Monodirectional intake pressure stabilization structure of pneumatic tool
US20160260559A1 (en) * 2015-03-04 2016-09-08 Snap-On Incorporated Rotatable Control Device with Axial Translation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951217A (en) * 1974-09-03 1976-04-20 Chicago Pneumatic Tool Company Impact air wrench having a two position pressure regulator
US4016940A (en) * 1975-10-21 1977-04-12 Chicago Pneumatic Tool Company Pneumatic nut runner having a directional valve and an air regulator
DE2647319A1 (en) * 1975-10-21 1977-04-28 Chicago Pneumatic Tool Co PNEUMATIC SCREWDRIVER WITH DIRECTIONAL VALVE AND AIR REGULATION
US4633978A (en) * 1985-07-22 1987-01-06 Hoffco, Inc. Brake caliper includes mechanical actuator with camming device and manual wear compensator
US5388612A (en) * 1991-12-04 1995-02-14 American Hydro-Surgical Instruments, Inc. Valve assembly
EP0682200A1 (en) * 1994-05-14 1995-11-15 Elektro- und Gas-Armaturen-Fabrik GmbH Actuating mechanism in a gas valve for gas appliances
US20050103306A1 (en) * 2003-11-17 2005-05-19 Nobuyuki Izumisawa Valve apparatus for air tool
US7036795B2 (en) * 2003-11-17 2006-05-02 Kabushiki Kaisha Shinano Seisakusho Valve apparatus for air tool
US20060185657A1 (en) * 2005-02-24 2006-08-24 Stanley Gabrel Paintball gun with power assisted trigger
US20100263737A1 (en) * 2009-04-16 2010-10-21 Chia-Chiung Chuang Monodirectional intake pressure stabilization structure of pneumatic tool
US8360098B2 (en) * 2009-04-16 2013-01-29 Chia-Chiung Chuang Monodirectional intake pressure stabilization structure of pneumatic tool
US20160260559A1 (en) * 2015-03-04 2016-09-08 Snap-On Incorporated Rotatable Control Device with Axial Translation
US10528073B2 (en) * 2015-03-04 2020-01-07 Snap-On Incorporated Rotatable control device with axial translation
US11221641B2 (en) * 2015-03-04 2022-01-11 Snap-On Incorporated Rotatable control device with axial translation

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